Brush construction



Sept 23, 1941- l. M. LEcKER 2,256,983

BRUSH CONSTRUCTION Filed Feb. 23, 19:58 2 sheets-sheet 2 /SAAC /17 Cuff/Q.

VENTOR.

ATTORNEYS.

Patented Sept. 23, 1941 e UNITED 2,256,983 BRUSH `ooNs'rieUcfrroN Isaac M. Lecker, New York, N. assgnoroftwoi thirds toWilliam Lindenbaum and onethird to v George Postel, b oth of NewYork, Y.- l Application `February 23, 193s,^serial1-0.19`1,90 2 1 claim. (o1. 15g- 17er i 1 'I'his invention relates to new and useful improvements in brushes and more particularly, it pertains to power driven brushes ofthe rotary type. r

Heretofore, it has been the generalpractice to build brushes for the cleaning of interior surfaces of a size generally smaller than the interior of the article to be cleaned. In use, such brushes are so manipulated as to move them overthe surface to be cleaned since; such brushes, except in the case of cleaning relatively small articles, were not capable of construction lin sizes large enough toA operate upon the entire surface to be cleaned when inserted within the article operated upon.

One object of the present invention is to improve the construction of brushes generally, and more particularly brushes of the power driven type for operation upon surfacesvof relatively large areas and which will effect a better cleaning operation than brushes vheretofore constructed for performing such operations.

A brush for operating upon interior surfaces Y and which will engage at one and the same time, the entire surface to be cleaned, must, in certain cases at least, conform to irregular contours. The improved construction herein set forth readily permits of the economical manufacture'of brushes to meet such conditions regardlessvo'f size or shape. A feature of the invention resides in a new and novel brush hub construction employing a plurality of parts adapted to be secured together to provide the completed hub.

A further feature of the invention -resides in the provision of novel means for assembling the several parts of a multiple part brush hub and of securing said parts rigidly together in their assembled form. I

AStill a further feature 'of the invention resides in a novel construction which permits of safe rotation of the brush at high speeds. i l

Other features of the invention relate to certain novel and improved constructions, arrangements and combinations of partsherei'nafter'd'escribed and particularly pointed out intheclaim, the advantages of which will be -readily understood and appreciated by those skilled in the art. The invention will be clearly understood from the accompanying drawings which illustrate the invention in its preferred forms andthe following detailed description Yof the constructions therein shown. Y.

Inthe drawings: 7 il f -W Figure 1 is a perspective 'view illustrating a brush constructed in accordance with one form of the present invention,

Figure 2 is a longitudinal sectional view on an enlarged scale taken substantially on the line 2 2 of Figure 1,

Figure; 3 is-a fragmentarysectional view taken substantially on the line 3-3 of Figure 2,

Figure 4 is a plan view of one of the sections of the multiplesection hub;

Figure 5 is a fragmentary plan vView of the other section of the brushhub,

Figure 6,;is a fragmentary longitudinal sectional view on'an enlarged scale, illustrating the manner in whichY the,brush .bristles are secured in the sections ofthe hub,

Figure '7 -is a fragmentary transverse sectional view onan enlarged scale illustrating the manner in which the bristles are secured in the sections of the brush hub, f i v kFigure Bis a fragmentary yview illustrating a modified form of brushhub; :A

Figure 9 is a longitudinal sectional view of the form shown in Figure 8, f f t Figure 10 is a fragmentary viewillustrating a still further modified 'formof the invention,

Figure 1'1 isa view in plan, illustrating the formshown inFigure 10, and; L .i y

Figure 12 is a plan view partly broken away and partly in'section, illustrating still a further modified form of the invention. 3'

Referring tothe drawingsby reference character and more. particularly to'Figures-l through 7, A designates the brush which is; formed from a plurality of tuftsl, Yof bristles I6 securedin a hub member B, in a manner which will be hereinafter more specifically set forth.-`A A Y The hub`member B. consists of a pluralityof separate :sections of which there are two illustrated -in the present disclosure-whichjsections are adaptedto be secured together, in various ways to be hereinafter described,` t'o form a complete brush head. y i

In accordance with the present illustration of the invention, each hub member consists of a shell like member I1, having a' substantially semi-cylindrical extension 18, at one end and a wall I9 closing the other end. 'Ihe outer'surface) of the shell-like members is formed with a plurality of fiatfaces 2U extending circumferentially therearound and'extending circumferentially of the inner surface of each'sliell section, there are channels Y2 l, there being preferably one channel for eachf of the circumferentially ex-V ries ofy'openings 22 which extend through the wall of the shell member, terminating 'at their inner end in theirrespective channel2l. i v In the manufacture .-off. the brush in; accordance with this invention,l each shell is preferably a complete semi-brush element. That is to say, each shell has its complement of bristles secured thereto and constitutes in itself, a complete element. Two or more of these units are secured together, depending upon the number of units employed, to form the completed brush.

The tufts of bristles are secured in the slflell sections in the following manner.

The reference numeral designates a wire and this wire is passed in looped form, through the openings, the loops being passed through said openings from the interior of theshell-like member. When a loop of suiiqient size projects from the outer portion of the shell-likemember, a brush or group of bristles are inserted therein and so positioned that the wire ofthe loop is at the center point between the ends of the bristles. The looped wire is next pulled through the wall of the shell-like member, drawing the'bristles into the opening 22v and forming them into a tuft I5. l

By reference to Figures 6 and 7, it will be noted that the openings 22 are tapered in such a manner that the tufts of bristles `will be prevented from pulling entirely through the opening 22, since the tapered construction of the opening tends to compress the'tufts of bristles where they are bent upon themselves.

The wire 2U is preferably continuous, and in the completed structure, occupies a position within the channel 2 I.

The hub sections havingY been individually formed, two of them aresecured together to complete the brush and I will now describe the different methods which I have illustrated to accomplish this result.

The hub sections are provided upon their meeting edges with interlocking lugs and recesses 50 and 5| and although I do not consider it necessary, I prefer to make these interlocking lugs and recesses of dove-tail shape.

After the hub sections are completed, they are relatively positioned so that the several lugs will enter their respective recesses whereupon the hub sections are moved relatively to each other to cause the lugs or projections to enter their respective recesses and cause .the interengagement heretofore mentioned.

It will be obvious that as `long as this interengagement between the lugs or projections and their recesses is maintained, the several hub sections will be retained in their proper brush forming relation and I will now describe afew of the various ways in. which the hub sections may be secured together in their operative positions.

In the form of the invention illustrated in Figures 1 through rI, I employ a core 35 which is preferably cylindrical in cross-section and extends throughout the length ofthe hub of the brush. i

When the two hub sections are connected together as heretofore described, their semi-cylindrical portions constitute a cylindrical extension 31, which provides an open end for the hub member, while their semi-circular walls ISL-form a `closure for the opposite endof the hubmember.

The core is inserted through the open end of the assembled hub member and as illustrated in-Figure 2, its inner end abuts the inner face of be provided with a threaded recess for the reception of a driving spindle not shown.

the closed end of the hub member to which it is 'secured by bolts or the like 38. The opposite end of the core member is of a diameter to snugly fill the cylindrical extension 31, to which it may be secured as by bolts or the like 39. 'Ihe core may It will be obvious that as llong as the core 35 is maintained in position Within the hollow hub member, relative movement of the shell sections will be prevented and all parts will be rigidly held in their operative position.

In the form illustrated in Figures 8 and 9, the two shell members are assembled to form the hollow hub inthe same manner as inthe heretofore described form. However, in this form of the invention, the hollow hub member is llled with molten metal which subsequently sets to form a rigid integral structure, thereby preventing relative vmovement of the parts of the hollow hub.

In Figures 10 and 11, I have illustrated a conv struction wherein the core is dispensed with en; tirely, the parts of the hollow hub member bef ing secured in their operative position by a band 40, which surrounds the cylindrical extension 31 and which may be secured thereto by a bolt or the like 4l. It Will be obvious that the band 40, and the bolt or the like 4I, may be employed in other forms than that illustrated in Figures 10 and 1l, if desired.

In Figure l2, I have shown a relatively long cylindrical brush and in this type of brush, the two sections of the hollow hub member, which sections are designated and 46 are of true semi-cylindrical form as distinguished from the tapering form of sections illustrated inthe other forms of the invention.

The meeting edges of the sections 45 and 46 are formed with interengaging 1ugs and recesses of dove-tail shape designated and 5|. Ihe core in this form, however, is of cylindrical shape and extends preferably throughout the length of the hollow hub member and may be secured thereto any desired manner. From the foregoing it will be, readily apparent that the present invention provides a new and improved construction in the manufacture of brush heads and more particularly, the invention provides for the manufacture of brushes in Ilarger sizes and greater variations of effective surface contours than is possible with present methods of manufacture. Furthermore, the present invention provides a more economical method of manu facture of brushes of the relatively smaller type.

In the present presentation of my invention, I have illustrated several different forms thereof, but it is to be understood that I do'not desire to be limited to the precise constructions shown since the invention may successfully be embodied in many other forms which rightfully` fall withi the scope of the` appended claim,`

Having thus described the invention, what is claimed as new, is;

A brush of the type described comprising a two-part hollow hub member, a reduced cylindrical extension projecting from one end of the hol,- low hub s member, a core lmember insertable through said cylindrical extension into the hollow hub member, and a band ,embracing the reduced extension of the' hollow hub member and removable therefrom and means passing through said removable band and having engagement with the core member to retain the several? parts in assembled relation. 1 i

ISAAC M. LECKER.. 

